Much to their credit, Cannondale will make good on their lifetime frame warranty. That's the good news.
The bad news?
There's really no forward-compatibility, from 2011 to 2019. Pretty much every bike Cannondale makes nowadays, has disc brakes. And - there may be other compatibility issues as well, between my 2011 components and a 2019 frame. So - I have a choice. They'll replace the frame but then I have to purchase any bits that are required in addition, to make it into a rider. Or... they will give me a 30% discount on any new bicycle in the lineup.
I went in and took a look - and even a quick test ride - on a "Quick" model urban bicycle. It's an upright-handlebar road bike, and this particular one had one chainring on front and a very wide-ratio 10-speed cassette on the back. I liked it - a lot. BUT - it would essentially duplicate the Long Haul Trucker bicycle which I anticipate riding far into the future. So, I may look at a lower-end mountain bike for playing in the foothills and desert. (I'm retired now, and that should afford more opportunity for recreational bicycling.) I say lower-end, because the Cannondale lineup appears to start around $650 and goes well into five-figure stratosphere! (Oh my goodness!) I'll report on what shakes out.